基于分形理论的巫山县农村居民点空间特征研究

Spatial Structure and Form of Rural Residential in Wushan County Based on Fractal Theory

以重庆市巫山县为研究区,基于分形理论的聚集维数、关联维数和形态维数,从县域和乡镇两个尺度对2010、2015年巫山县农村居民点空间结构和形态特征进行综合分析。研究结果表明:巫山县农村居民点空间结构和形态分形特征显著;县域尺度上,聚集维数、关联维数随时间变化而减小,形态维数值持续增大,农村居民点空间结构以巫峡镇为中心向四周衰减,凝聚态发展趋势明显,但空间形态愈加不规则,稳定性减弱;乡镇尺度上,一些乡镇农村居民空间结构不紧凑,相互关联程度有待提高。今后可通过公路交通等基础设施建设,增强农村居民点空间相互作用,优化空间布局;依据社会经济发展现状和农村用地自然历史特性开展乡村土地利用规划,提高农村土地利用效率。研究结果可为巫山县农村居民点用地资源分配及土地利用合理组织提供参考。

Based on the aggregation dimension,correlation dimension and morphological dimension of fractal theory,this paper measured and analyzed the change of spatial structure and morphological characteristics of rural residential lands of Wushan county in 2010 and 2015 from two scales of county and township.Results showed that:The spatial structure and form of rural residential lands'fractal characteristics in Wushan county were significant.On county scale,the aggregation dimension and correlation dimension decreased as the time went on,and the form dimension increased continuously.And the spatial structure of the rural residential area took Wuxia town as the center and decay around and the development trend of clustered matter was obvious,but the shape features became more complex and the stability was reduced.On the township scale,some villages and towns in rural lands had loose spatial structure and the correlation remained to be improved.So we need to strengthen the infrastructure construction of highway traffic and enhance the spatial interaction of rural residents,so as to optimize the spatial distribution.Also we can carry out rural land use planning according to the present situation of social economic development and the natural historical characteristics of rural land use to improve it's efficiency.This study can provide an academic basis for the allocation of land resources and the rational use of rural residential lands of Wushan county in practice.